/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.sentry;

/**
 * An adapter to make UncaughtExceptionHandler testable
 *
 * @since 2021-06-02
 */
interface UncaughtExceptionHandler {
    /**
     * getDefaultUncaughtExceptionHandler
     *
     * @return Thread.UncaughtExceptionHandler instance
     */
    Thread.UncaughtExceptionHandler getDefaultUncaughtExceptionHandler();

    /**
     * setDefaultUncaughtExceptionHandler
     *
     * @param handler UncaughtExceptionHandler
     */
    void setDefaultUncaughtExceptionHandler(Thread.UncaughtExceptionHandler handler);

    /**
     * An adapter
     *
     * @since 2021-06-02
     */
    final class Adapter implements UncaughtExceptionHandler {
        /**
         * INSTANCE
         */
        private static final Adapter INSTANCE = new Adapter();

        private Adapter() {
        }

        /**
         * get UncaughtExceptionHandler instance
         *
         * @return UncaughtExceptionHandler instance
         */
        static UncaughtExceptionHandler getInstance() {
            return Adapter.INSTANCE;
        }

        /**
         * getDefaultUncaughtExceptionHandler
         *
         * @return Thread.UncaughtExceptionHandler instance
         */
        @Override
        public Thread.UncaughtExceptionHandler getDefaultUncaughtExceptionHandler() {
            return Thread.getDefaultUncaughtExceptionHandler();
        }

        /**
         * setDefaultUncaughtExceptionHandler
         *
         * @param handler UncaughtExceptionHandler
         */
        @Override
        public void setDefaultUncaughtExceptionHandler(Thread.UncaughtExceptionHandler handler) {
            Thread.setDefaultUncaughtExceptionHandler(handler);
        }
    }
}
